Which describes a significant difference between the north and the south in the years leading up to the civil war? a. the north did not allow slavery, while the south depended on it. b. the north supported two major political parties, while the south supported only one major political party. c. the north had a system of railways while the south relied only on road and river systems. d. the north grew its own food, while the south focused on cash crops and imported most of its food.

A. The North did not allow slavery, while the South depended on it.

Explanation:

While the northern economy depended mostly on manufacturing,  the rural southern economy relied on the production of cotton.

Southern colonies´ farm economy could not be sustained without slaves. However, in the northern colonies, the cold weather and infertile soil could not maintain a farm economy, so they came to depend on manufacturing and trade.  The clash between these two models led to the war.

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.